diff --git a/resources/day8/re_frame/trace/main.css b/resources/day8/re_frame/trace/main.css
index 260e5d8..bc6ef3e 100644
--- a/resources/day8/re_frame/trace/main.css
+++ b/resources/day8/re_frame/trace/main.css
@@ -362,7 +362,11 @@
 #--re-frame-trace-- ul.filter-items .filter-item:hover,
 #--re-frame-trace-- .subtrees .filter-item:hover,
 #--re-frame-trace-- ul.filter-items .subtree-button:hover,
-#--re-frame-trace-- .subtrees .subtree-button:hover {
+#--re-frame-trace-- .subtrees .subtree-button:hover,
+#--re-frame-trace-- ul.filter-items .filter-item:focus,
+#--re-frame-trace-- .subtrees .filter-item:focus,
+#--re-frame-trace-- ul.filter-items .subtree-button:focus,
+#--re-frame-trace-- .subtrees .subtree-button:focus {
   text-decoration: line-through;
 }
 #--re-frame-trace-- .icon {
diff --git a/resources/day8/re_frame/trace/main.less b/resources/day8/re_frame/trace/main.less
index c9d3977..c95864a 100644
--- a/resources/day8/re_frame/trace/main.less
+++ b/resources/day8/re_frame/trace/main.less
@@ -441,7 +441,8 @@
         color: @text-color;
       }
 
-      &:hover {
+      &:hover,
+      &:focus {
         text-decoration: line-through;
       }
     }